Outage time per customer: 4 h 40 min in Mississippi, 57 min in Illinois
Weighted by home accounts, the utilities in Mississippi reported 280 minutes without power per customer in 2024. In Illinois it was 57 minutes. Major event days are left out.
What we found
44 states have enough reporting utilities to rank. 7 are left out because too few utilities or too few customers report.
The typical outage figure here is a floor. Storms that EIA classes as major events are removed, so the worst days are not in these numbers.
Map
- 57 min to 77 min
- 77 min to 107 min
- 107 min to 143 min
- 143 min to 168 min
- 168 min to 280 min
Highest and lowest
Ten longest outage times
Ten shortest outage times
How we computed it
- For each utility with 1,000+ home accounts, take SAIDI without major event days from EIA-861 2024.
- Weight each utility by its home accounts and average within the state: sum(accounts × SAIDI) ÷ sum(accounts).
- Keep states with at least 3 reporting utilities and enough coverage of home accounts.
- Divide the longest by the shortest: 280.0 ÷ 56.9 = 4.92.
Formula: state SAIDI = sum(accounts x utility SAIDI) / sum(accounts); ratio = highest / lowest
All 44 places
| Mississippi | 1 | 280 | 4 h 40 min | 12 |
|---|---|---|---|---|
| Maine | 2 | 273 | 4 h 33 min | 3 |
| Virginia | 3 | 245 | 4 h 05 min | 12 |
| Louisiana | 4 | 219 | 3 h 39 min | 6 |
| Georgia | 5 | 210 | 3 h 30 min | 30 |
| Arkansas | 6 | 196 | 3 h 16 min | 13 |
| Alaska | 7 | 194 | 3 h 14 min | 5 |
| New Mexico | 8 | 172 | 2 h 52 min | 6 |
| Tennessee | 9 | 168 | 2 h 48 min | 41 |
| California | 10 | 164 | 2 h 44 min | 19 |
| Michigan | 11 | 160 | 2 h 40 min | 18 |
| Washington | 12 | 158 | 2 h 38 min | 20 |
| Texas | 13 | 153 | 2 h 33 min | 45 |
| Idaho | 14 | 153 | 2 h 33 min | 6 |
| Montana | 15 | 150 | 2 h 30 min | 3 |
| Kentucky | 16 | 146 | 2 h 26 min | 29 |
| North Carolina | 17 | 144 | 2 h 24 min | 35 |
| New York | 18 | 143 | 2 h 23 min | 4 |
| Ohio | 19 | 133 | 2 h 13 min | 29 |
| Pennsylvania | 20 | 130 | 2 h 10 min | 5 |
| Oregon | 21 | 127 | 2 h 07 min | 9 |
| Indiana | 22 | 124 | 2 h 04 min | 28 |
| Oklahoma | 23 | 122 | 2 h 02 min | 17 |
| Colorado | 24 | 119 | 1 h 59 min | 21 |
| Kansas | 25 | 114 | 1 h 54 min | 11 |
| Missouri | 26 | 107 | 1 h 47 min | 26 |
| Utah | 27 | 104 | 1 h 44 min | 8 |
| New Jersey | 28 | 103 | 1 h 43 min | 3 |
| Wisconsin | 29 | 98 | 1 h 38 min | 23 |
| South Carolina | 30 | 93 | 1 h 33 min | 20 |
| Minnesota | 31 | 91 | 1 h 31 min | 34 |
| North Dakota | 32 | 85 | 1 h 25 min | 8 |
| Iowa | 33 | 84 | 1 h 24 min | 12 |
| New Hampshire | 34 | 84 | 1 h 24 min | 3 |
| Massachusetts | 35 | 77 | 1 h 17 min | 12 |
| Maryland | 36 | 77 | 1 h 17 min | 6 |
| Connecticut | 37 | 74 | 1 h 14 min | 5 |
| Arizona | 38 | 70 | 1 h 10 min | 11 |
| Nebraska | 39 | 68 | 1 h 08 min | 9 |
| Delaware | 40 | 67 | 1 h 07 min | 3 |
| Florida | 41 | 67 | 1 h 07 min | 17 |
| Nevada | 42 | 64 | 1 h 04 min | 5 |
| South Dakota | 43 | 57 | 57 min | 9 |
| Illinois | 44 | 57 | 57 min | 12 |
44 rows. Also as a plain file: facts/data/outage-minutes.csv.
CSVWhat this does not show
Utilities choose how to measure outages, and the major-event rule differs between them. A low number can mean good wires or good luck with the weather that year.
Sources, dates and licences
| Source | Data period | Retrieved | Licence |
|---|---|---|---|
| EIA-861 annual electric power industry report, 2024 final | data year 2024 (2015 to 2023 files for history) | 1 Oct 2026 | U.S. government data, public domain; EIA asks for citation |
All source data are U.S. government publications. The tables and charts on this page are our own computations from them; how the sources are joined.
Related
Most reliable power by state · Citing this page · Facts feed
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Questions
What is SAIDI?
Minutes without power per customer in a year, averaged over all customers served. It is an IEEE 1366 measure.
Which state has the longest outages?
Mississippi, with 280 minutes in 2024.
Which has the shortest?
Illinois, with 57 minutes.
Why are some states missing?
7 places do not have enough utilities reporting both numbers to rank fairly.
Are hurricanes included?
Not when EIA-861 reporting marks them as major event days. The all-events figure is on the major outage rankings.